CN113035427A - High-temperature-resistant cable and preparation method thereof - Google Patents

High-temperature-resistant cable and preparation method thereof Download PDF

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Publication number
CN113035427A
CN113035427A CN202110314852.8A CN202110314852A CN113035427A CN 113035427 A CN113035427 A CN 113035427A CN 202110314852 A CN202110314852 A CN 202110314852A CN 113035427 A CN113035427 A CN 113035427A
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cable
fluororesin
parts
conductor
preparation
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CN113035427B (en
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陈成州
黄冰玉
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Shanghai Shangli Special Cable Co ltd
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Shanghai Shangli Special Cable Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

The application relates to the technical field of cable manufacturing, in particular to a high-temperature-resistant cable and a preparation method thereof. A high-temperature-resistant cable comprises a conductor, a cable insulation and a cable sheath from inside to outside, wherein the cable insulation is made of modified fluororesin, and the modified fluororesin comprises the following raw materials in parts by mass, 80-100 parts of fluororesin; 5-15 parts of a silane coupling agent; 2-4 parts of a dispersing agent; 20-30 parts of hollow glass beads; 25-40 parts of superfine basalt powder; the fluororesin is one of polytetrafluoroethylene, polyfluorinated ethylene and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer; the preparation method comprises the following steps: drawing conductor monofilaments and annealing the conductor monofilaments; twisting the conductor monofilaments into conductor bundles; and the cable insulation and the cable sheath are sequentially coated outside the conductor bundle. This application has the service temperature who promotes the cable, alleviates the advantage of cable insulation's thermal ageing problem simultaneously.

Description

High-temperature-resistant cable and preparation method thereof
Technical Field
The application relates to the technical field of cable manufacturing, in particular to a high-temperature-resistant cable and a preparation method thereof.
Background
Due to the continuous promotion of Chinese urbanization construction and the annual increase of power consumption demand, the cable is widely applied to urban power grids. However, as the operational life of the cable increases, the aging of the cable becomes more and more serious, and the probability of insulation breakdown accidents caused by the aging also increases year by year. The heat aging phenomenon of the cable insulation layer often occurs due to different climatic temperatures and different application scenes of the cable in different areas of China, which is one of the main reasons for accidents, so that the research and development of the high-temperature-resistant cable are more and more paid attention by people.
At present, high-temperature-resistant cables usually adopt high-temperature-resistant materials to prepare an insulation and an outer sheath so as to play a role in resisting thermal ageing. Although TPE or other materials specified by the current standard have excellent flexibility and mechanical properties, the temperature resistance level of the TPE or other materials is only 90 ℃; some have also set up the cooling tube in the cable to alleviate the conductor and generate heat the thermal aging that the in-process of electrically conducting produced, for example chinese patent publication No. CN206741986U discloses an electric automobile cooling charging cable, adopts the structure that increases the cooling tube in the middle of the conductor and the insulating layer outside, though can reduce the heating of the conductor in the charging process, but the tolerance temperature of cable still does not promote greatly.
In view of the above-mentioned related technologies, the inventor believes that there is a great need to develop a novel high temperature resistant cable to increase the service temperature of the cable and alleviate the problem of thermal aging of the cable insulation.
Disclosure of Invention
In order to improve the service temperature of the cable and relieve the thermal aging problem of a cable insulating layer, the application provides a high-temperature-resistant cable and a preparation method thereof.
In a first aspect, the present application provides a high temperature resistant cable, which adopts the following technical scheme:
a high-temperature-resistant cable sequentially comprises a conductor, a cable insulation and a cable sheath from inside to outside, wherein the cable insulation is made of modified fluororesin, and the modified fluororesin comprises the following raw materials in parts by mass, 80-100 parts of fluororesin; 5-15 parts of a silane coupling agent; 2-4 parts of a dispersing agent; 20-30 parts of hollow glass beads; 25-40 parts of superfine basalt powder; the fluororesin is one of polytetrafluoroethylene, polyperfluoroethylene and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
By adopting the technical scheme, the fluororesin has excellent heat resistance and is often used as a base material of high-temperature-resistant cable insulation, hollow glass beads and superfine basalt powder are used as heat insulation filler in the invention, wherein the hollow glass beads have the characteristics of low density, small size and self-lubrication, the viscosity characteristic of the base material is improved, the density is reduced, the structure is optimized, the heat resistance of the cable insulation base material is improved, meanwhile, compared with other fillers, stress concentration is not easy to cause, adverse effects on the mechanical property of the material are not easy to generate, but when only the hollow glass beads are added into the fluororesin as the filler, the cable insulation is easy to separate from the hollow glass beads in a high-temperature environment, so that the superfine basalt powder is compounded to fill gaps among the hollow glass beads, the occurrence probability of the phenomenon is reduced, and therefore, the hollow glass beads and the superfine basalt powder have a synergistic cooperation effect in the fluororesin, the heat-proof property of the cable insulation is effectively improved, the service temperature of the cable is improved, and meanwhile, the heat aging problem of the cable insulation is relieved.
Optionally, the preparation method of the modified fluororesin comprises the following steps,
step 1: carrying out acid hydrolysis on a silane coupling agent and a dispersing agent, adding superfine basalt powder, stirring and dispersing, then adding hollow glass beads, continuously stirring, reacting for 1-2h, filtering and washing under reduced pressure to obtain a modifier;
step 2: and (3) melting the fluororesin, adding the modifier prepared in the step (1), and extruding and granulating to obtain the modified fluororesin.
By adopting the technical scheme, the hollow glass beads and the superfine basalt powder are dispersed in the fluororesin by virtue of the action of the silane coupling agent and the dispersing agent, so that the hollow glass beads and the superfine basalt powder are dispersed in the fluororesin more uniformly and have more stable properties.
Optionally, the silane coupling agent is a coupling agent KH550, and the dispersant is a wetting dispersant V966.
By adopting the technical scheme, when the silane coupling agent and the dispersing agent are selected, the obtained system has higher dispersing degree and better high-temperature resistant effect.
Optionally, the average particle size of the hollow glass beads is 20-50 μm.
By adopting the technical scheme, when the average particle size of the hollow glass beads is 20-50 μm, the hollow glass beads have better modification effect on the fluororesin.
Optionally, the average particle size of the superfine basalt powder is 0.5-10 μm.
By adopting the technical scheme, when the average grain size of the superfine basalt powder is 0.5-10 mu m, the gap filling effect of the superfine basalt powder on the hollow glass beads is better, and the tolerance stability of the cable insulation at high temperature is further improved.
Optionally, the cable sheath is made of a TPU material.
By adopting the technical scheme, the TPE material has better heat resistance and crack resistance, and the comprehensive performance of the cable is improved when the TPE material is made into a cable sheath.
In a second aspect, the present application provides a method for preparing a high temperature resistant cable, which adopts the following technical scheme:
a preparation method of a high-temperature-resistant cable comprises the following steps,
s1: drawing conductor monofilaments and annealing the conductor monofilaments;
s2: stranding the conductor monofilaments annealed in the step S1 into conductor bundles;
s3: and sequentially coating the cable insulation and the cable sheath outside the conductor bundle.
In summary, the present application has the following beneficial effects:
1. according to the cable insulation material, the modified fluororesin is adopted as a base material for cable insulation, the hollow glass beads and the superfine basalt powder are used as modified fillers, and due to the synergistic cooperation of the hollow glass beads and the superfine basalt powder in the fluororesin, the service temperature of the cable is increased, and the thermal aging problem of the cable insulation layer is relieved.
2. Hollow glass beads and superfine basalt powder with specific particle sizes are preferably adopted in the cable, and the hollow glass beads and the superfine basalt powder within the particle size range have good synergistic effect, so that the high-temperature resistance of the cable is further improved.
3. The TPE material is preferably adopted as the base material of the cable sheath in the application, so that the heat resistance and the cracking resistance of the cable are improved.
Detailed Description
Source of raw materials
Unless otherwise specified, the following raw material specifications and sources are shown in Table 1.
TABLE 1 raw material specifications and sources
Figure BDA0002990752630000031
Preparation example of modified fluororesin
Preparation example 1
A preparation method of modified fluororesin comprises the following steps:
step 1: weighing 5g of KH550 and 4g V966, dissolving in 100g of distilled water-ethanol mixed solution, wherein 80g of distilled water and 20g of ethanol are added, glacial acetic acid is added to adjust the pH value of the solution to 6.0, after stirring and mixing uniformly, 25g of superfine basalt powder (selected by a laboratory vibrating sieve) with the particle size of 12 mu m is added into the mixed solution, stirring and dispersing are carried out for 20min at the rotating speed of 200r/min, then 30g of hollow glass microspheres (selected by a laboratory vibrating sieve) with the particle size of 16 mu m are added, stirring and reacting are carried out for 1.5h at the rotating speed of 200r/min, and after pressure reduction and filtration, washing with deionized water to obtain a modifier;
step 2: and (2) banburying 100g of FEP, adding the modifier obtained in the step (1), mixing for 10min to obtain a blend, adding the blend into an open type plasticator, carrying out open mixing, after 20 times of mixing, discharging to obtain a sheet, shearing the sheet, putting the sheet into a mold, putting the mold with the sheet into a flat vulcanizing machine, heating at 200 ℃ for 5min, keeping the temperature, continuously carrying out cold pressing at 15MPa for 5min, and discharging to obtain the modified fluororesin sheet.
Preparation examples 2 to 11
Preparation examples 2 to 11 relate to a method for preparing a modified fluororesin, based on preparation example 1, differing mainly in the amount by mass of each raw material, as shown in table 2.
TABLE 2 preparation examples 2 to 11 used amounts of respective raw materials
Figure BDA0002990752630000041
Preparation example 12
Preparation example 12 relates to a process for producing a modified fluororesin, based on preparation example 1, except that the coupling agent KH550 in step 1 is replaced with an equal mass of coupling agent KH 560.
Preparation example 13
Preparation example 13 relates to a method for producing a modified fluororesin, based on preparation example 1, except that the wetting dispersant V966 in step 1 is replaced with the dispersant HY161 of equal mass.
Preparation example 14
Preparation example 14 relates to a process for producing a modified fluororesin, based on preparation example 1, except that in step 1, KH550 is replaced with KH560, which is an equal mass of the coupling agent, while V966, which is a wetting dispersant, is replaced with HY161, which is an equal mass of the dispersant.
Preparation examples 15 to 16
Preparation examples 15 to 16 relate to a method for preparing a modified fluororesin, based on preparation example 6, except that the selection of the fluororesin was different, and FEP was replaced with the same mass of the following, as shown in Table 3.
TABLE 3 selection of fluororesin for preparation examples 15 to 16
Preparation example Preparation example 15 Preparation example 16
Kind of fluororesin PTFE PFA
Preparation examples 17 to 25
Preparation examples 17 to 25 relate to a method for producing a modified fluororesin, based on preparation example 16, differing mainly in that the particle diameters of the selected hollow glass beads and the ultrafine basalt powder are different (the particle diameter is required by sieving after procurement), as shown in table 4.
TABLE 4 average particle diameters of hollow glass beads and ultrafine basalt powders selected in preparation examples 17 to 25
Preparation example Hollow glass micro-bead grain diameter/mum Superfine basalt powder grain size/mum
Preparation example 17 20 12
Preparation example 18 40 12
Preparation example 19 50 12
Preparation example 20 60 12
Preparation example 21 16 12
Preparation example 22 16 0.5
Preparation example 23 16 0.4
Preparation example 24 16 5
Preparation example 25 16 10
Preparation example 26
Preparation example 26 relates to a method for producing a modified fluororesin, based on preparation example 14, except that hollow glass microspheres were replaced with FEP of equal mass.
Preparation example 27
Preparation example 27 relates to a method for producing a modified fluororesin, based on preparation example 14, except that the ultrafine basalt powder was replaced with FEP of equal quality.
Preparation example 28
Preparation example 28 relates to a method for producing a modified fluororesin, based on preparation example 14, except that both the hollow glass beads a and the ultrafine basalt powder were replaced with FEP of equal mass.
Preparation examples 29 to 32
Preparation examples 29 to 32 relate to a method for preparing a modified fluororesin, based on preparation example 14, differing mainly in the difference in the quality between the hollow glass beads and the ultrafine basalt powder in step 1, as shown in table 5.
TABLE 5 preparation examples 29 to 32 amounts of hollow glass beads A and ultrafine basalt powder
Preparation example Hollow glass micro-bead dosage/g Dosage of superfine basalt powder/g
Preparation example 29 18 25
Preparation example 30 33 25
Preparation example 31 30 21
Preparation example 32 30 43
Examples
Examples 1 to 25
A cable insulation is prepared by melting and extruding the following raw materials respectively, and is shown in Table 6.
Table 6 examples 1-25 raw material sources for cable insulation
Examples Example 1 Example 2 Example 3 Example 4 Example 5
Source of raw materials Preparation example 1 Preparation example 2 Preparation example 3 Preparation example 4 Preparation example 5
Examples Example 6 Example 7 Example 8 Example 9 Example 10
Source of raw materials Preparation example 6 Preparation example 7 Preparation example 8 Preparation example 9 Preparation example 10
Examples Example 11 Example 12 Example 13 Example 14 Example 15
Source of raw materials Preparation example 11 Preparation example 12 Preparation example 13 Preparation example 14 Preparation example 15
Examples Example 16 Example 17 Example 18 Example 19 Example 20
Source of raw materials Preparation example 16 Preparation example 17 Preparation example 18 Preparation example 19 Preparation example 20
Examples Example 21 Example 22 Example 23 Example 24 Example 25
Source of raw materials Preparation example 21 Preparation example 22 Preparation example23 Preparation example 24 Preparation example 25
Comparative example
Comparative examples 1 to 7
A cable insulation is prepared by melting and extruding the following raw materials respectively, and the details are shown in Table 7.
TABLE 7 comparative examples 1-7 sources of raw materials
Comparative example Source of raw materials
Comparative example 1 Preparation example 26
Comparative example 2 Preparation example 27
Comparative example 3 Preparation example 28
Comparative example 4 Preparation example 29
Comparative example 5 Preparation example 30
Comparative example 6 Preparation example 31
Comparative example 7 Preparation example 32
Application example
Application example 1
A high-temperature-resistant cable is prepared by the following steps:
s1: selecting a copper rod with the diameter of 5mm, drawing the copper rod into a copper wire with the diameter of 0.5mm by a copper wire drawing machine, carrying out oxygen-insulated annealing at 500 ℃, and then carrying out tinning on the copper conductor wire by a hot tinning process;
s2: stranding the tin-plated copper conductor wires in the step S1 into conductor bundles;
s3: the conductor bundle obtained in step S2 was melt-extruded to cover the cable insulation and the cable jacket of the TPU in example 1.
Application examples 2 to 25
A high temperature resistant cable is based on the preparation process of application example 1, and the difference is mainly that the source of the cable insulation is different, and the specific point is shown in Table 7.
Table 7 sources of application examples 2-25 cable insulation
Figure BDA0002990752630000061
Figure BDA0002990752630000071
Application example 26
A high-temperature-resistant cable is based on the preparation process of application example 14, and the difference is mainly that the material of a cable sheath is replaced by equal-quality TPE material.
Comparative application example
Comparative application examples 1 to 7
A cable, based on application example 26, differing primarily in the origin of the cable insulation, is shown in Table 8.
Table 8 comparative application examples 1-7 sources of cable insulation
Comparative application example Source of raw materials
Comparative application example 1 Comparative example 1
Comparative application example 2 Comparative example 2
Comparative application example 3 Comparative example 3
Comparative application example 4 Comparative example 4
Comparative application example 5 Comparative example 5
Comparative application example 6 Comparative example 6
Comparative application example 7 Comparative example 7
Performance test
Detection method
The cable insulation of the examples and comparative examples were tested for performance.
1. The heat resistance of the cable is indirectly expressed by the heat conductivity coefficient of the cable insulation, and when the heat conductivity coefficient of the test piece is higher, the heat resistance is indirectly expressed to be better. The test method is as follows:
and (3) detecting the heat resistance of the cable insulation: according to the requirements of GB/T10294-88, a thermal constant analyzer is used for testing the thermal conductivity coefficient of the cable insulation, and the test condition is 500 ℃ for 3h of burning.
2. Detecting the heat aging resistance: and (3) taking the test piece, placing the test piece at 200 ℃ for 168h, respectively measuring the tensile strength of the test piece before and after the test, and calculating the reduction rate of the tensile strength.
The results are shown in Table 9.
TABLE 9 results of Performance test of examples 1 to 25 and comparative examples 1 to 7
Examples of the invention Coefficient of thermal conductivity (W.m)-1·K-1) Tensile Strength decrease (%)
Example 1 0.18 16.93
Example 2 0.19 16.04
Example 3 0.18 16.34
Example 4 0.18 15.87
Example 5 0.19 15.42
Example 6 0.22 14.05
Example 7 0.19 16.32
Example 8 0.20 15.09
Example 9 0.20 14.87
Example 10 0.21 14.23
Example 11 0.19 15.30
Example 12 0.16 18.02
Example 13 0.17 19.23
Example 14 0.15 20.12
Example 15 0.22 13.76
Example 16 0.23 12.98
Example 17 0.23 12.43
Example 18 0.24 12.86
Example 19 0.23 12.04
Example 20 0.23 11.97
Example 21 0.25 12.34
Example 22 0.24 12.76
Example 23 0.23 13.06
Example 24 0.23 11.45
Example 25 0.25 12.84
Comparative example 1 0.06 22.40
Comparative example 2 0.07 20.04
Comparative example 3 0.05 25.63
Comparative example 4 0.08 19.84
Comparative example 5 0.10 21.84
Comparative example 6 0.08 17.54
Comparative example 7 0.09 19.04
As can be seen from the combination of examples 1-25 and Table 9, the cable insulation prepared by the preparation method of the present application has a thermal conductivity of 0.15-0.25 W.m after being burned at 500 ℃ for 3h-1·K-1In comparison with 0.05-0.10 W.m in comparative example-1·K-1The heat resistance of the embodiment is obviously superior to that of the comparative example indirectly; after the test piece is placed at the high temperature of 200 ℃ for 168 hours, the reduction rate of the tensile strength of the test piece is 11.45-19.32%, and compared with the tensile strength of the comparative example, the reduction rate is obviously improved by 22.04-25.63%.
As can be seen from comparative examples 1 to 11 in combination with table 9, the two modified fillers of hollow glass microspheres and ultrafine basalt powder synergistically improve heat resistance in the base material for cable insulation, and the synergistic effect of both is better in a specific particle size range, and as can be seen from comparative examples 1 to 7, when the amount of one of the materials is changed or one of the materials is removed, the better heat resistance effect cannot be achieved.
Comparing examples 12 to 14 with example 6 and combining table 9, it can be seen that when KH550 is selected as the silane coupling agent and V966 is selected as the wetting dispersant, the heat resistance and the thermal aging resistance of the obtained test piece are better, which indicates that the dispersion effect and the synergistic effect of the hollow glass microspheres and the ultrafine basalt powder are better when the above-mentioned materials are selected.
Comparing examples 15 to 16 with example 6 and combining table 9, it is understood that when polytetrafluoroethylene or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is used as the fluororesin substrate for cable insulation, the heat resistance of the resulting test piece is more excellent.
It is understood by comparing examples 17 to 25 with example 16 and by referring to Table 9 that when the particle diameters of the hollow glass microspheres and the ultrafine basalt powder are restricted to a certain range, the heat resistance of the cable insulation is further improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (8)

1. A high-temperature-resistant cable sequentially comprises a conductor, a cable insulation and a cable sheath from inside to outside, and is characterized in that the cable insulation is made of modified fluororesin, and the modified fluororesin comprises the following raw materials in parts by mass, 80-100 parts of fluororesin; 5-15 parts of a silane coupling agent; 2-4 parts of a dispersing agent; 20-30 parts of hollow glass beads; 25-40 parts of superfine basalt powder; the fluororesin is one of polytetrafluoroethylene, polyperfluoroethylene and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
2. A high temperature resistant cable according to claim 1, wherein said modified fluororesin is prepared by a process comprising the steps of,
step 1: carrying out acid hydrolysis on a silane coupling agent and a dispersing agent, adding superfine basalt powder, stirring and dispersing, then adding hollow glass beads, continuously stirring, reacting for 1-2h, filtering and washing under reduced pressure to obtain a modifier;
step 2: and (3) melting the fluororesin, adding the modifier prepared in the step (1), and extruding and granulating to obtain the modified fluororesin.
3. A high temperature resistant cable according to claim 2, wherein: the silane coupling agent is a coupling agent KH550, and the dispersing agent is a wetting dispersing agent V966.
4. A high temperature resistant cable according to claim 2, wherein: the average particle size of the hollow glass beads is 20-50 mu m.
5. A high temperature resistant cable according to claim 2, wherein: the average particle size of the superfine basalt powder is 0.5-10 mu m.
6. A high temperature resistant cable according to claim 2, wherein: the fluororesin is polytetrafluoroethylene or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer.
7. A high temperature resistant cable according to claim 1, wherein: the cable sheath is made of TPU materials.
8. A method of manufacturing a high temperature resistant cable according to any one of claims 1 to 7, characterized in that: comprises the following steps of (a) carrying out,
s1: drawing conductor monofilaments and annealing the conductor monofilaments;
s2: stranding the conductor monofilaments annealed in the step S1 into conductor bundles;
s3: sequentially coating the cable insulation and cable jacket according to any one of claims 1 to 7 over the conductor bundle.
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CN116641263A (en) * 2023-06-25 2023-08-25 国网黑龙江省电力有限公司电力科学研究院 Transformer insulation paper

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CN105968451A (en) * 2016-03-14 2016-09-28 安徽电缆股份有限公司 A high-temperature resistant low-smoke flame retardant rubber cable material
US20190326034A1 (en) * 2018-04-18 2019-10-24 Ohio Aerospace Institute High performance multilayer insulation composite for high voltage applications
CN110483925A (en) * 2018-05-14 2019-11-22 日立金属株式会社 Thermoplastic fluorocarbon resin composition, electric wire and cable

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Publication number Priority date Publication date Assignee Title
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CN103923411A (en) * 2014-04-03 2014-07-16 广东华声电器股份有限公司 Hollow glass bead/polyvinyl chloride component type wire and cable compound and preparation method thereof
CN105968451A (en) * 2016-03-14 2016-09-28 安徽电缆股份有限公司 A high-temperature resistant low-smoke flame retardant rubber cable material
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